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Piezoelectricity in Two-Dimensional Group III Mono

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Post# of 22465
Posted On: 03/26/2015 10:16:49 PM
Posted By: dockzef
Piezoelectricity in Two-Dimensional Group III Monochalcogenides

Wenbin Li, Ju Li

(Submitted on 25 Mar 2015)

We find that several layer-phase group-III monochalcogenides, including GaS, GaSe and InSe, are piezoelectric in the monolayer form. First-principles calculations reveal that the piezoelectric coefficients of monolayer GaS, GaSe and InSe are on the same order of magnitude as the earlier discovered two-dimensional piezoelectric materials, such as BN and MoS2 monolayers. Our study expands the family of two dimensional piezoelectric materials, suggesting that strong piezoelectric response can occur in a wide range of two dimensional materials with broken inversion symmetry. The co-existence of piezoelectricity and superior photo-sensitivity in these two-dimensional semiconductors enables the integration of electromechanical and optical sensors on the same material platform.

http://arxiv.org/abs/1503.07379


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